Swift OS X Programming for Absolute Beginners

Chapter    16

Making Choices with Radio Buttons, Check Boxes, Date Pickers, and Sliders

Rather than let the user choose a specific command through a button, user interfaces often give choices to pick. Such choices let the user pick one or more options, such as customizing the way a program works. When a user interface needs to offer multiple choices, the two most common ways to offer options are through radio buttons and check boxes.

Radio buttons get their name from car radios that let you press a button to switch to a different radio station. Since you can only listen to one radio station at a time, radio buttons give you multiple options but limit you to choosing only one button. The moment you select a different button, your previous choice ...